Home / 20,478.29-30,719.61-5,687.24

Finding the Fourth Proportional to 20,478.29, 30,719.61 and 5,687.24

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Solution

The fourth proportional to 20,478.29, 30,719.61 and 5,687.24 is: 8,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.29 : 30,719.61 = 5,687.24 : x
  2. Step 2: Convert to fraction form
    20,478.29/30,719.61 = 5,687.24/x
  3. Step 3: Cross multiply
    20,478.29x = 30,719.61 × 5,687.24
  4. Step 4: Simplify right side
    20,478.29x = 174,709,641.18
  5. Step 5: Solve for x
    x = 174,709,641.18/20,478.29
  6. Step 6: Final answer
    x = 8,531.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.